Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

HLST128: Physiology II > Ch.10 Vascular Physiology > Flashcards

Ch.10 Vascular Physiology Flashcards

1
Q

blood reconditioning occurs

A

constantly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

purpose of blood recoditioning

A
  • adjust blood flow to maintain homeostasis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what are the reconditioning organs

A
  • digestive organs
  • kidneys
  • skin
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is the purpose of reconditioning organs

A
  • receive more blood then need so has the ability to redistribute it
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

non reconditioning organs include

A
  • brain
  • skeletal musclesw
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is the purpose of non reconditioning organs

A
  • increase blood supple to achieve homeostasis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

flow rate formula

A

FR=P/R

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is the pressure gradient

A
  • the pressure difference between the beginning and end of the vessel
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

where does blow flow in the pressure area

A
  • moves from an area of high concentration to low concentration
  • moves down the pressure gradient
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

resistance is

A

the measure of opposition to the blood flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

increased resistance ________ flow rate

A

decreases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what are the three factors that influence resistance

A
  • vessel viscosity
  • vesssel lenght
  • vessel radius
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is the MAJOR determinate of resistance

A
  • vessel radius
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

how does vessel radius effect resistance

A

decreased radius = increased resistance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

how does vessel lenght effect resistance

A

longer vessel = more surface area = increased resistance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

how is vessel viscosity determined

A
  • by the number of RBC’s
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

how does vessel viscosity effect resistance

A

increased viscosity = greater resistance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

arterial blood pressure =

A

constant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

arteries are also know as

A

rapid transit pathways

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

resistance in the arteries is

A

little

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

arteries act as

A

pressure reserviours

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

why are arteries known as pressure reservoirs

A
  • they are the driving force for blood when the heart is relaxing
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Pulse pressure formula

A

PP= SBP - DBP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

what is normal pulse pressure

A

40 mm HG

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

what is pulse pressure

A
  • pressure difference between systolic and diastolic pressure
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

systolic pressure

A
  • maximum pressure excreted in the arteries
  • when the ventricles contracts
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

what is normal systolic pressure

A

120

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

diastolic pressure

A
  • minimum pressure in the arteries
  • ventricles relaxes
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

what is normal diastolic pressure

A

80

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Mean arterial pressure formula

A

MAP = DP + 1/3 SP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

what is normal MAP

A

93

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

what is mean arterial pressure

A
  • the average pressure driving blood forward into tissues throughout the cardiac system
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

MAP must be high enough to

A

ensure sufficent driving pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

MAP must not be too high because

A

it will make excess work for the heart and ruture the capillaries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

arterioles are

A

major resitance vessels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

why are arterioles known as major resitance vessels

A
  • because they vasoconstrict
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

arterioles makeup

A
  • highly musclular
  • contain very little elastic tissue
38
Q

Purpose of arterioles

A
  • adjust to recondition organs
  • help reguate MAP
39
Q

vasoconstriction

A
  • narrowing of the vessel wall
40
Q

vasoconstriction effect on resistance

A
  • increases resistance
41
Q

vasodilation

A
  • relaxation
  • enlargement of the circumfrance of the vessel
42
Q

vasodialtion effect on resistance

A
  • decreases resistance
43
Q

increased myogenic activity causes

myogenic activity = ability of blood vessels to constrict

A

vasoconstriction

44
Q

decreases oxygen causes

A

vasodilation

45
Q

increases carbon dioxide casues

A

vasodialation

46
Q

increased endothelin causes

A

vasoconstriction

47
Q

decreased myogenic activity causes

A

vasodilation

48
Q

increased oxegen casues

A

vasoconstriction

49
Q

decreased carbon dioxide casues

A

vasoconstriction

50
Q

decreased sypathetic stimulation causes

A

vasodialtion

51
Q

increased heat causes

A

vasodilation

52
Q

decreased heat causes

A

vasoconstriction

53
Q

increased sympathetic stimulation causes

A

vasoconstriction

54
Q

increased sympathetic stimulation is caused by

A
  • an increase is vasopressin
  • an increase in angiotension II
55
Q

decreased sypathetic stimulation is caused by

A
  • increased histamine
56
Q

types of intrinsic controls

A
  • chemical influences
  • physical influences
57
Q

what are intrinsic controls

A
  • changes within a tissue / organ
  • alters radius of a vessel by altering smooth muscle
58
Q

What are chemical influences

A
  • local metabolic changes
  • histamine release
59
Q

what are physical influences

A
  • hot / cold
  • chemical responce to shear stress
  • myogenic responce to stretch
60
Q

extrinsic controls are important in

A

blood pressure regulation

61
Q

extrinsic controls examples

A
  • neural inputs (hormones)
62
Q

Capillaries are known as

A

“exchange vessels”

63
Q

why are capillaries known as exchanged vessels

A

-they have maximized surface area and maximized diffusion
- slow velocity

64
Q

what does slow velocity do

A
  • allow enough time for exchange
65
Q

Velocity of blood flow is _____________ to total cross sectional area

A

inversly proportional

66
Q

Hwo are substances exchanged through cappilaries

A
  • diffusion
  • bulk flow
67
Q

the lymphatic system provides

A

an excessory route by which fluid can be returned from the interstial fluid to the blood

68
Q

oedema is also known as

A

the swelling of the tissues

69
Q

when does oedema occur

A

when too much intersticial fluid accumulates

70
Q

causes of oedema

A
  • decreases concentration of plasma proteins (kidney / liver disease, loss of plasma proteins burned from the surface)
  • increased permulability of cappillary wall (allergic reactions)
71
Q

veins are also known as

A

blood reserviours

72
Q

makeup of veins

A
  • little restance
  • highly densiable
  • less cross sectional area (walls appear thin and collapsed)
  • little smooth muscle
  • little elasticity
73
Q

Main determinate of MAP

A
  • cardiac output
  • total peripheral resistance
74
Q

MAP formula #2

A

MAP = CO x TPR

75
Q

sympathetic stimulation activates

A

a1 - adrenoceptors

76
Q

Parasympathic stimulation effect on blood pressure

A

decreases

77
Q

hypovolmic shock effect on CO

A

decreases

78
Q

Hypovolmic shock is

A

low volume shock

79
Q

Hypovolmic shock causes

A
  • sever haemorrhage
  • excessive vommiting
  • diarrhoea
  • urinary losses
80
Q

cardiogenic shock is

A

heart produced shock

81
Q

cardiogenic shock is caused by

A
  • weekend heart
82
Q

cardiogenic shock effect on cardiac output

A

decreased CO

83
Q

vasogenic shock is

A

vessel produced shock

84
Q

vasogenic shock effect on total peripheral resistance

A

decreases

85
Q

vasogenic shock is caused by

A
  • septic shock
  • anaphylactic shock
86
Q

effect of septic shock

A

vasodilator released from bacteria

87
Q

effect of anaphylatic shock

A
  • increased histamine —> vasodialtion
88
Q

neurogenic shock is

A

nerve produced shock

89
Q

neurogenic shock effect on TPR

A

decreases

90
Q

Effect of Neurogenic shock

A

decreased sympathic activity —> decreased vascular tone —> vasodialtion

HLST128: Physiology II (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions